Fr. George Metallinos
Heresy is not just an error of the reasoning faculty, nor are heretics simply misplaced in finding the truth. In their case something happens deeper and more substantial. They know the Bible to the letter, often in amazing ways. But they lack something essential, and this lack radically distinguishes them from the Fathers. They lack the experience of the Holy Spirit of the Fathers, the interior illumination of the Spirit. This is because they have not gone through the therapeutic process of the Church.